Device for controlling windows of the sliding type



April 20, 1937. 4 w. YOUNG 2,077,609

DEVICE FOR CONTROLLING WINDOWS OF THE SLIDING TYPE 4 Filed Aug. 28, 1956 Patented Apr. 20, 1937 UNITED STATES PATENT OFFIQE William Young, Wishaw, Lanarkshire, Scotland Application August 28, 1936, Serial No. 98,411 In Great Britain February 14, 1935 1 Claim.

This invention relates to devices for controlling sliding sash windows of the type in which teeth are provided on the framed window which engage racks, catches, slots or the like, mounted upon the frame for holding it in the desired position, and are moved out of engagement therewith when it is desired to move the window up or down. Such windows are very often difficult to open, stick in certain places, and do not move freely.

One of the objects of the invention is to provide a Window which will slide easily and will not stick.

Another object of the invention is to make a 5 window which be self-locking in any desired position by means of cams operated by spring pressure.

A further object of the invention is to provide hand means for rocking said cams for disengaging the projections.

A further object of the invention is to make a window which is simple in construction and cheap to manufacture.

The invention will now be described by way of example with reference to the accompanying drawing, in which:-

Figure 1 is a vertical section of the window in locked position.

Figure 2 is a vertical section of the window in the unlocked position.

Figure 3 is a front elevation of the window with a portion of the channel removed.

Figure 4 is a detail of the positioning block.

Referring to the drawing, the framed window 35 A is the movable portion and slides in the guide channels B in the framing. The top rail of the frame A is made as a hollow tube C and a rod D is inserted therein so as to be rotatable. In the centre of the tube C a slot is cut and in thisslot 40 a thumb catch E is provided which is secured to the rod D and co-operates with a finger grip F rigidly secured to the frame A. The rod D is provided with a spring or springs l which keep the thumb and finger grips E and F separated.

At each end of the operating rod a cam G is fixed which slides in the channel B. The cams G are triangular in shape and are secured to the rod at their apices as shown in Figures 1 and 2.

On the sides of the frame A teeth H are provided which are adapted to engage in slots J in the sides of the channels B. Three such teeth are illustrated, but one or any other number may be 5 provided. The overall width of the teeth and the frame A is less than the width of the channel B in order that the said frame A may slide up and down in the channel B.

At each corner of the bottom of the frame A is 10 provided a positioning block K which slides in the channel B, and such block is spring loaded, if desired, to prevent rattle.

The spring or springs around the rod D will hold the cams in the position shown in Figure 1 in which one corner of the cams G will hold the teeth H in engagement with the slots J, and the window will be locked from moving. When the rod D is partially rotated by pressing E and F together, the other corner of the cams G moves the teeth H out of engagement with the slots J and the window is free to slide up and down as required.

The locking means hereinbefore described may be used in conjunction with horizontally sliding windows as well as with vertically sliding windows which employ known balancing means.

It is to be understood that the construction of details and the arrangement of parts other than those described may be made without departing from the scope of the invention.

I claim:

A device for controlling the sliding sash of a window including in combination, projections on said window at each side thereof adapted to engage recesses in the frame at each side thereof,

a rockable shaft mounted horizontally on the top member of said Window, spring means controlling the ro-tation of said shaft, a cam fixed at each end of said shaft and located at each side of the window, and hand means for rocking said cams against said spring pressure to disengage said projections from said recesses, said cams being rocked back by said spring pressure to reengage the said projections in the said recesses.

WILLIAM YOUNG. 

